/contrib/bind9/lib/dns/rdata/generic/opt_41.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 285 lines · 194 code · 59 blank · 32 comment · 44 complexity · 1cad7b7707fbe200f3b496fcf20ea9bc MD5 · raw file
- /*
- * Copyright (C) 2004, 2005, 2007, 2009, 2012 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1998-2002 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
- /* $Id$ */
- /* Reviewed: Thu Mar 16 14:06:44 PST 2000 by gson */
- /* RFC2671 */
- #ifndef RDATA_GENERIC_OPT_41_C
- #define RDATA_GENERIC_OPT_41_C
- #define RRTYPE_OPT_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON | \
- DNS_RDATATYPEATTR_META | \
- DNS_RDATATYPEATTR_NOTQUESTION)
- static inline isc_result_t
- fromtext_opt(ARGS_FROMTEXT) {
- /*
- * OPT records do not have a text format.
- */
- REQUIRE(type == 41);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(lexer);
- UNUSED(origin);
- UNUSED(options);
- UNUSED(target);
- UNUSED(callbacks);
- return (ISC_R_NOTIMPLEMENTED);
- }
- static inline isc_result_t
- totext_opt(ARGS_TOTEXT) {
- isc_region_t r;
- isc_region_t or;
- isc_uint16_t option;
- isc_uint16_t length;
- char buf[sizeof("64000 64000")];
- /*
- * OPT records do not have a text format.
- */
- REQUIRE(rdata->type == 41);
- dns_rdata_toregion(rdata, &r);
- while (r.length > 0) {
- option = uint16_fromregion(&r);
- isc_region_consume(&r, 2);
- length = uint16_fromregion(&r);
- isc_region_consume(&r, 2);
- sprintf(buf, "%u %u", option, length);
- RETERR(str_totext(buf, target));
- INSIST(r.length >= length);
- if (length > 0) {
- if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
- RETERR(str_totext(" (", target));
- RETERR(str_totext(tctx->linebreak, target));
- or = r;
- or.length = length;
- RETERR(isc_base64_totext(&or, tctx->width - 2,
- tctx->linebreak, target));
- isc_region_consume(&r, length);
- if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
- RETERR(str_totext(" )", target));
- }
- if (r.length > 0)
- RETERR(str_totext(" ", target));
- }
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- fromwire_opt(ARGS_FROMWIRE) {
- isc_region_t sregion;
- isc_region_t tregion;
- isc_uint16_t length;
- unsigned int total;
- REQUIRE(type == 41);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(dctx);
- UNUSED(options);
- isc_buffer_activeregion(source, &sregion);
- total = 0;
- while (sregion.length != 0) {
- if (sregion.length < 4)
- return (ISC_R_UNEXPECTEDEND);
- /*
- * Eat the 16bit option code. There is nothing to
- * be done with it currently.
- */
- isc_region_consume(&sregion, 2);
- length = uint16_fromregion(&sregion);
- isc_region_consume(&sregion, 2);
- total += 4;
- if (sregion.length < length)
- return (ISC_R_UNEXPECTEDEND);
- isc_region_consume(&sregion, length);
- total += length;
- }
- isc_buffer_activeregion(source, &sregion);
- isc_buffer_availableregion(target, &tregion);
- if (tregion.length < total)
- return (ISC_R_NOSPACE);
- memcpy(tregion.base, sregion.base, total);
- isc_buffer_forward(source, total);
- isc_buffer_add(target, total);
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- towire_opt(ARGS_TOWIRE) {
- REQUIRE(rdata->type == 41);
- UNUSED(cctx);
- return (mem_tobuffer(target, rdata->data, rdata->length));
- }
- static inline int
- compare_opt(ARGS_COMPARE) {
- isc_region_t r1;
- isc_region_t r2;
- REQUIRE(rdata1->type == rdata2->type);
- REQUIRE(rdata1->rdclass == rdata2->rdclass);
- REQUIRE(rdata1->type == 41);
- dns_rdata_toregion(rdata1, &r1);
- dns_rdata_toregion(rdata2, &r2);
- return (isc_region_compare(&r1, &r2));
- }
- static inline isc_result_t
- fromstruct_opt(ARGS_FROMSTRUCT) {
- dns_rdata_opt_t *opt = source;
- isc_region_t region;
- isc_uint16_t length;
- REQUIRE(type == 41);
- REQUIRE(source != NULL);
- REQUIRE(opt->common.rdtype == type);
- REQUIRE(opt->common.rdclass == rdclass);
- REQUIRE(opt->options != NULL || opt->length == 0);
- UNUSED(type);
- UNUSED(rdclass);
- region.base = opt->options;
- region.length = opt->length;
- while (region.length >= 4) {
- isc_region_consume(®ion, 2); /* opt */
- length = uint16_fromregion(®ion);
- isc_region_consume(®ion, 2);
- if (region.length < length)
- return (ISC_R_UNEXPECTEDEND);
- isc_region_consume(®ion, length);
- }
- if (region.length != 0)
- return (ISC_R_UNEXPECTEDEND);
- return (mem_tobuffer(target, opt->options, opt->length));
- }
- static inline isc_result_t
- tostruct_opt(ARGS_TOSTRUCT) {
- dns_rdata_opt_t *opt = target;
- isc_region_t r;
- REQUIRE(rdata->type == 41);
- REQUIRE(target != NULL);
- opt->common.rdclass = rdata->rdclass;
- opt->common.rdtype = rdata->type;
- ISC_LINK_INIT(&opt->common, link);
- dns_rdata_toregion(rdata, &r);
- opt->length = r.length;
- opt->options = mem_maybedup(mctx, r.base, r.length);
- if (opt->options == NULL)
- return (ISC_R_NOMEMORY);
- opt->offset = 0;
- opt->mctx = mctx;
- return (ISC_R_SUCCESS);
- }
- static inline void
- freestruct_opt(ARGS_FREESTRUCT) {
- dns_rdata_opt_t *opt = source;
- REQUIRE(source != NULL);
- REQUIRE(opt->common.rdtype == 41);
- if (opt->mctx == NULL)
- return;
- if (opt->options != NULL)
- isc_mem_free(opt->mctx, opt->options);
- opt->mctx = NULL;
- }
- static inline isc_result_t
- additionaldata_opt(ARGS_ADDLDATA) {
- REQUIRE(rdata->type == 41);
- UNUSED(rdata);
- UNUSED(add);
- UNUSED(arg);
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- digest_opt(ARGS_DIGEST) {
- /*
- * OPT records are not digested.
- */
- REQUIRE(rdata->type == 41);
- UNUSED(rdata);
- UNUSED(digest);
- UNUSED(arg);
- return (ISC_R_NOTIMPLEMENTED);
- }
- static inline isc_boolean_t
- checkowner_opt(ARGS_CHECKOWNER) {
- REQUIRE(type == 41);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(wildcard);
- return (dns_name_equal(name, dns_rootname));
- }
- static inline isc_boolean_t
- checknames_opt(ARGS_CHECKNAMES) {
- REQUIRE(rdata->type == 41);
- UNUSED(rdata);
- UNUSED(owner);
- UNUSED(bad);
- return (ISC_TRUE);
- }
- static inline int
- casecompare_opt(ARGS_COMPARE) {
- return (compare_opt(rdata1, rdata2));
- }
- #endif /* RDATA_GENERIC_OPT_41_C */